Thanks for the response.
The dryline bypass I refer to is the one with the red arrow. It is also pulling straight up from the end of the green main line, as is the return line from the lifter (marked with a yellow arrow).
You're right that I have SS ball valves at each 3/16 line and have closed them with no change in vacuum.
Essentially the Dry line and green mainline do run directly into the manifold. Dry comes in from the top of the high return line to the releaser (like a whip) and goes to the "Y" at the end of the green main line. There is a blue line at this "Y" that goes straight to the manifold. There is a "T" just before that with another line dropping from the green main line down to the manifold.
Going to try a CDL leak detector from Fred and see what I can find...but we're pulling lots of sap as it is and I just don't have time to start tearing everything apart.
I've already wasted two days monkeying around and I'm done with that. If it finds the leak I'm buying the detector and will repair whatever it is when I have time.
John Allin
14x18 Hemlock Timber Frame Sugar House 2009
Leader 2x6 w/Patriot Raised Flue Pan 2009
Leader Steam Hood 2014 - Clear Filter Press 2015
Leader Revolution Pan and SS Pre-Heater 2016
CDL Hobby RO & Air Tech L25 Hi Vac Pump 2019
06' Gator HPX to collect wood & sap
14' Ski-Doo Tundra for winter work in the woods
Great Family 3 grown kids+spouses and 7 grand kids who like the woods
7th Gen Born in Canada - Raised in Chardon Ohio - Maple Capital of the World..<grin>.